Joef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
Alain Tressaud, Jacques Darriet
Institut de Chimie de la Mati?re Condensée de Bordeaux, 87 Avenue Dr. A. Schweitzer, 33608 Pessac Cedex, France
GdF(AsF6)2, GdF3×2BF3, H3OGdF3BF4 and TbF(AsF6)2 obey Curie-Weiss law in the temperature range 4.2 K < T < 300 K with mi(eff) = 7.35, 7.08, 7.51 and 8.72 B.M. Compounds can be considered as magnetically dilute. Deviations of observed values from predicted are not major, suggesting that 4f shell is not substantially affected by the environment of the cation. EuF3×2BF3 doesn't obey Curie-Weiss law. Data obtained in the 150 K < T < 300 K temperature range can be fitted to linear curve giving mi(eff) = 3.10 B.M.